[2 cases of ring 18 chromosome].
D000015:Abnormalities, Multiple; D002675:Child, Preschool; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D003582:Cytogenetics; D003878:Dermatoglyphics; D006801:Humans
Deux observations de chromosome 18 en anneau.